CN110056056B

CN110056056B - Drain valve and closestool with same

Info

Publication number: CN110056056B
Application number: CN201910424745.3A
Authority: CN
Inventors: 李惜平
Original assignee: Xiamen Axent Corp Ltd
Current assignee: Xiamen Axent Corp Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2021-11-23
Anticipated expiration: 2039-05-21
Also published as: CN110056056A

Abstract

The invention discloses a drain valve and a closestool with the same, wherein the drain valve comprises a base, a top cover connected above the base and a diaphragm clamped between the top cover and the base, the diaphragm and the top cover jointly enclose to form a back pressure cavity, and the top cover is provided with a drain opening and a water inlet which are communicated with the back pressure cavity; the base is enclosed to form a drainage channel, and the base is provided with a drainage outlet; the diaphragm can deform up and down, can be in sealing contact with the base when deforming downwards, so that the drainage channel and the water outlet are mutually sealed, and can be separated from the base when deforming upwards so that the drainage channel and the water outlet are mutually communicated. The water discharge valve generates pressure change according to water inlet and water discharge of the backrest pressure cavity, so that the diaphragm is driven to deform towards different directions, and the water discharge port and the water discharge channel are communicated or sealed. The drain valve is simple in structure, can be used for an air pressure type closestool and a gravity type closestool, and is good in universality.

Description

Drain valve and closestool with same

Technical Field

The invention relates to the technical field of toilets, in particular to a drainage valve and a toilet with the drainage valve.

Background

At present, gravity toilets and air pressure toilets are available in the market, and the flushing principles of the two toilets are different, the gravity toilets flush by converting the gravitational potential energy of water into the kinetic energy of water, and the air pressure toilets flush by the pressure difference between the inside and the outside of a closed water tank.

The two toilet bowl drain valves have complicated structures, so that the manufacturing cost is high, and the two toilet bowl drain valves have great difference and cannot be used universally, so that the manufacturing cost is increased.

In view of the above, it is a technical problem to be solved by those skilled in the art to develop a drain valve which has a simple structure and can be commonly used in gravity toilets and air pressure toilets.

Disclosure of Invention

In order to solve the technical problem, the invention provides a drain valve which comprises a base, a top cover connected above the base and a diaphragm clamped between the top cover and the base, wherein the diaphragm and the top cover jointly enclose to form a back pressure cavity;

the base is enclosed to form a drainage channel, and the base is provided with a drainage outlet; the diaphragm can deform up and down, can be in sealing contact with the base when deforming downwards, so that the drainage channel and the water outlet are mutually sealed, and can be separated from the base when deforming upwards so that the drainage channel and the water outlet are mutually communicated.

The water discharge valve generates pressure change according to water inlet and water discharge of the backrest pressure cavity, so that the diaphragm is driven to deform towards different directions, and the water discharge port and the water discharge channel are communicated or sealed. The drain valve is simple in structure, can be used for an air pressure type closestool and a gravity type closestool, and is good in universality.

The drain valve further comprises a diaphragm seat and a spring, and the diaphragm seat and the spring are both arranged in the back pressure cavity; the diaphragm seat is connected with the diaphragm so as to support the diaphragm and move up and down along with the deformation of the diaphragm; the spring is compressed between the diaphragm seat and the top wall of the top cover to apply a downward biasing force to the diaphragm.

The water discharge valve further comprises a valve needle, wherein the lower end of the valve needle is connected to the membrane seat, and the upper end of the valve needle extends into the water inlet so as to move up and down in the water inlet along with the deformation of the membrane.

According to the drain valve, the membrane is a rolling membrane, the rolling membrane is provided with the cavity part and the outer edge, the cavity opening of the cavity part faces upwards, and the outer edge is arranged on the periphery of the cavity opening of the cavity part and clamped between the top cover and the base.

In the above drain valve, the membrane seat includes a support body for supporting the rolling membrane, and the support body includes a groove portion, a limiting portion, and a clamping portion; the groove opening of the groove part faces upwards, and the outer wall of the groove part is matched with the inner wall of the cavity part; the limiting part is arranged on the periphery of the notch of the groove part and is used for abutting against the top wall of the top cover when the diaphragm deforms upwards to the limiting position; the clamping portion is arranged below the groove portion, an annular clamping groove is formed in the periphery of the clamping portion, an inner hole is formed in the bottom wall of the groove portion, and the inner edge of the inner hole is located in the annular clamping groove.

According to the drain valve, the membrane seat further comprises a guide body arranged below the support body, and the guide body is positioned in the drain channel; the guide body comprises a base column and guide ribs arranged on the periphery of the base column, the guide ribs and the drainage channel extend in the vertical direction, and the guide ribs and the drainage channel are matched to guide the diaphragm seat to move in the vertical direction.

The drain valve further comprises a plurality of clamping blocks, the clamping blocks are arranged on the periphery of the bottom end of the top cover at intervals, clamping arms clamped with the clamping blocks one by one are arranged at the top end of the base, and the membrane is clamped between the top surfaces of the clamping arms and the bottom surface of the top cover.

The drain valve further comprises a connecting cylinder for connecting a water inlet pipeline, the connecting cylinder is arranged at the top end of the top cover and communicated with the water inlet, and an opening is formed in the cylinder wall of the connecting cylinder.

In addition, the invention also provides another closestool which is an air pressure type closestool and comprises a main water tank, a water inlet connecting pipe and a water discharge valve, wherein a water outlet hole is formed in the pipe wall of the water inlet connecting pipe and is communicated with the main water tank, the water discharge valve is any one of the water discharge valves, a water discharge opening of the water discharge valve is communicated or closed with a water discharge part externally connected with the main water tank through a control valve, a water inlet of the water discharge valve is communicated with a lower port of the water inlet connecting pipe, and a water discharge opening of the water discharge valve is communicated with the main water tank.

In addition, the invention also provides a toilet bowl, which is a gravity type toilet bowl and comprises a water storage tank, a water inlet valve and a water discharge valve, wherein the water inlet valve comprises a lower water outlet hole and an upper water outlet hole, the lower water outlet hole is communicated with the water storage tank, and the water discharge valve is any one of the water discharge valves; the water outlet of the drain valve is communicated or closed with the water storage tank through a control valve; the water inlet of the drain valve is communicated with the upper water outlet hole of the water inlet valve through a pipeline, and the water outlet of the drain valve is communicated with the water storage tank.

Since the above-mentioned discharge valve has the above-mentioned technical effects, the toilet bowl having the discharge valve also has the above-mentioned technical effects, and the discussion thereof will not be repeated.

Drawings

Fig. 1 is a schematic structural view of a specific embodiment of a drain valve provided by the present invention;

fig. 2 is a sectional view of the drain valve shown in fig. 1 in a closed state;

fig. 3 is a sectional view of the drain valve shown in fig. 1 in an open state;

FIG. 4 is a schematic diagram of the diaphragm, diaphragm seat, valve needle, etc. of FIG. 1;

FIG. 5 is a cross-sectional view of the diaphragm of FIG. 1;

FIG. 6 is a cross-sectional view of the diaphragm seat of FIG. 1;

FIG. 7 is a schematic diagram of an embodiment of an air pressure toilet according to the present invention;

FIG. 8 is a schematic structural diagram of the water storage tank, the balance water tank and the like in FIG. 7;

FIG. 9 is a cross-sectional view of the storage tank of FIG. 7;

FIG. 10 is a schematic structural view illustrating a position where the water inlet connection pipe is connected to the drain valve in FIG. 7;

FIG. 11 is a schematic diagram of a gravity-type toilet according to an embodiment of the present invention;

FIG. 12 is a schematic view of the structure of the fill valve of FIG. 11;

fig. 13 is a cross-sectional view of fig. 11.

The reference numerals in fig. 1 to 13 are explained as follows:

10, a water discharge valve;

11 top cover, 111 water outlet, 112 water inlet;

12 a base, 121 a water outlet and 122 a clamping arm;

13 rolling diaphragm, 131 cavity, 132 outer edge, 133 inner hole;

a back pressure cavity and b drainage channel;

14 diaphragm seats, 141 groove parts, 142 limiting parts, 143 clamping parts, 1431 annular clamping grooves, 144 base columns and 145 guide ribs;

15 springs; 16 a valve needle; 17, a fixture block; 18 connecting cylinder, 181 opening;

20 air pressure type toilet;

21 water storage tank, 22 balance water tank, 23 water inlet joint, 24 water discharge pipe, 25 water distribution box, 25 water spray pipe, 26 water spray pipe, 27 brush ring water pipe, 28 water inlet connecting pipe and 281 water outlet;

30 gravity toilets;

31 water storage tank, 32 water inlet valve, 321 water outlet, 322 water outlet, 323 water inlet, 324 buoy, 325 adjusting rod, 326 adjusting arm, 33 flushing button and 34 control valve.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view of an embodiment of a drain valve 10 according to the present invention; fig. 2 is a sectional view of the drain valve shown in fig. 1 in a closed state; fig. 3 is a sectional view of the drain valve shown in fig. 1 in an open state; FIG. 4 is a schematic diagram of the diaphragm, diaphragm seat, valve needle, etc. of FIG. 1; FIG. 5 is a cross-sectional view of the diaphragm of FIG. 1; fig. 6 is a cross-sectional view of the diaphragm seat of fig. 1.

As shown in fig. 1-3, the water discharge valve 10 comprises a base 12, a top cover 11 connected to the base 12, and a membrane clamped therebetween.

The top cover 11 is provided with a water outlet 111 and a water inlet 112, the membrane and the top cover 11 jointly enclose to form a back pressure cavity a, and the back pressure cavity a drains water through the water outlet 111 and feeds water through the water inlet 112;

wherein, the base 12 encloses to form a drainage channel b, and the base 12 is provided with a drainage port 121.

The diaphragm can deform up and down, and can be in sealing contact with the base 12 when deforming downwards, so that the drainage channel b and the drainage port 121 are sealed, and can be separated from the base 12 when deforming upwards, so that the drainage channel b and the drainage port 121 are communicated with each other.

The opening and closing processes of the drain valve 10 will be described below.

And (3) closing process: when the drain opening 111 is controlled to be closed, water flows into the back pressure chamber a through the water inlet 112, the water pressure in the back pressure chamber a is increased, so that the diaphragm is deformed downward to be in sealing contact with the base 12 (as shown in fig. 2), and at this time, the drain passage b and the drain opening 121 are closed. When the water pressure in the back pressure cavity a is increased to be equal to the water pressure of the inlet water, the back pressure cavity a automatically stops the inlet water.

The starting process comprises the following steps: the drain opening 111 is controlled to be opened, water in the back pressure chamber a is drained through the drain opening 111, and the water pressure in the back pressure chamber a is reduced, so that the diaphragm is deformed upward to a state of being separated from the base 12 (as shown in fig. 3), and at this time, the drain passage b and the drain opening 121 communicate with each other.

In the specific implementation, the flow area of the water inlet 112 should be smaller than the flow area of the water outlet 111, so that the diaphragm can have enough time to deform upwards during the valve opening process because the water inlet speed is smaller than the water discharge speed, thereby facilitating the separation of the diaphragm from the base 12.

As described above, the water discharge valve generates pressure variation according to the water intake and discharge of the back pressure chamber a, thereby driving the diaphragm to deform in different directions, thereby achieving communication or closure of the water discharge port 121 and the water discharge passage b. The drain valve is simple in structure, can be used for an air pressure type closestool and a gravity type closestool, and is good in universality.

Specifically, as shown in fig. 1, the water discharge valve 10 further includes a plurality of latch blocks 17 (four in the figure), and each latch block 17 is disposed at an interval on the periphery of the bottom end of the top cover 11.

Meanwhile, the top end of the base 12 is provided with a plurality of clamping arms 122 (the number of the clamping arms is the same as that of the clamping blocks 17), each clamping arm 122 is sequentially arranged at intervals along the circumferential direction, and a water outlet 121 is formed between every two adjacent clamping arms 122. In addition, the outer side of the clip arm 122 is provided with a clip protrusion, the clip block 17 is provided with a clip opening, and the clip protrusions are correspondingly clipped into the clip openings one by one, so that the top cover 11 and the base 12 are clipped together. Also, as shown in fig. 2 or 3, the diaphragm is sandwiched between the top surface of the clip arm 122 and the bottom surface of the top cover 11. The clamping structure is convenient to disassemble and assemble, the water outlet 121 is convenient to form, and the membrane is convenient to fix.

Of course, the top cover 11 and the base 12 may be connected by other connecting structures, for example, a hole plate may be disposed at the top end of the base 12, so that the top cover 11 is inserted into the hole plate.

Specifically, as shown in fig. 1, the drain valve 10 further includes a connecting cylinder 18, and the connecting cylinder 18 is disposed at the top end of the top cover 11 and is communicated with the water inlet 112 of the top cover 11. Therefore, when in use, the water inlet pipeline can be inserted into the connecting cylinder 18, so that the drainage valve 10 is conveniently connected with the water inlet pipeline.

More specifically, the connecting tube 18 has an opening 181 formed in a wall thereof, so that the inlet line can be connected to the tank of the toilet through the opening 181 as needed (as will be understood from fig. 10 and hereinafter).

Specifically, as shown in fig. 2 and 3, the water discharge valve 10 further includes a diaphragm seat 14 located in the back pressure chamber a, and the diaphragm seat 14 is coupled to the diaphragm to support the diaphragm and move up and down according to the deformation of the diaphragm.

Specifically, as shown in fig. 2 and 3, the drain valve 10 further includes a spring 15, and the spring 15 is located in the back pressure chamber a and compressed between the diaphragm seat 14 and the top wall of the top cover 11. In this way, the elastic force of the spring 15 can be applied to the diaphragm through the diaphragm seat 14, so that the diaphragm is subjected to downward pressing force, and thus, the sealing property of the contact position of the diaphragm and the base 12 can be improved.

Specifically, as shown in fig. 2 and 3, the drain valve 10 further includes a valve needle 16, an upper end of the valve needle 16 extends into the water inlet 112 of the top cover 11, and a lower end is connected to the membrane seat 14. Therefore, when the diaphragm deforms up and down, the diaphragm seat 14 is driven to move up and down, and the valve needle 16 is driven to move up and down in the water inlet 112, so that the water inlet 112 can be dredged, and the effect of preventing the water inlet 112 from being blocked is achieved.

Specifically, as shown in fig. 4 and 5, the diaphragm is a rolling diaphragm 13, and the rolling diaphragm 13 includes a cavity portion 131 and an outer edge 132 provided on the outer periphery of the opening of the cavity portion 131. As shown in fig. 2 and 3, the cavity portion 131 of the rolling diaphragm 13 is disposed with its opening facing upward, so that the rolling diaphragm 13 is formed in an inverted "top hat" shape as a whole, and the outer edge 132 of the rolling diaphragm 13 is clamped between the top surface of the clip arm 122 and the bottom surface of the top cover 11. Rolling diaphragm 13 compares the plane diaphragm, and deformability is stronger and be more convenient for form big volumetric backpressure chamber a, and the volume of backpressure chamber a is some big, does benefit to the leakproofness when promoting rolling diaphragm 13 and base 12 contact.

In particular, the membrane seat 14 comprises a support. As shown in fig. 6, the support body specifically includes: a groove 141 with an upward notch, a stopper 142 provided on the outer periphery of the notch of the groove 141, and a detent 143 provided below the groove 141.

As shown in fig. 3, the groove portion 141 is located inside the cavity portion 131, and the outer wall of the groove portion 141 is fitted to the inner wall of the cavity portion 131, so that the sealing property of the back pressure chamber a can be ensured.

As shown in fig. 3, when the diaphragm seat 14 moves upward to the limit position, the stopper 142 abuts against the top wall of the top cover 11, so that excessive deformation of the diaphragm can be prevented.

As shown in fig. 6, the locking portion 143 has a ring-shaped locking groove 1431, and as shown in fig. 5, the bottom wall of the cavity 131 has an inner hole 133. As shown in fig. 3, the inner edge of the bore 133 is located within the annular groove 1431 so that the diaphragm and the diaphragm seat 14 are securely coupled together.

More specifically, the membrane seat 14 also comprises a guide body, which is arranged below the support body and is located in the drainage channel b. As shown in fig. 4 and 6, the guide body specifically includes a base pillar 144 and a plurality of guide ribs 145 (four guide ribs are provided in the drawing) provided on the outer periphery of the base pillar 144, and the guide ribs 145 are provided at intervals in the circumferential direction. As shown in fig. 3, the guide rib 145 extends in the vertical direction, the drain passage b also extends in the vertical direction, and the guide rib 145 engages with the drain passage b to move the diaphragm seat 14 in the vertical direction at all times.

In addition, the present invention also provides an air pressure type toilet 20, and the air pressure type toilet 20 includes the above-mentioned drain valve 10. Referring to fig. 7 to 10, fig. 7 is a schematic structural view of an embodiment of an air pressure type toilet according to the present invention; FIG. 8 is a schematic structural view of the main tank, the balance tank, etc. of FIG. 7; FIG. 9 is a cross-sectional view of the main tank of FIG. 7; fig. 10 is a schematic structural view of a position where the water inlet connection pipe is connected to the drain valve in fig. 7.

As shown, the air pressure type toilet 20 has a main water tank 21 and a balance water tank 22 provided in a casing thereof. The top of the main tank 21 communicates with the bottom of the balance tank 22. Furthermore, the top of the main water tank 21 is connected with a water inlet connector 23, one end of the water inlet connector 23 extends into the main water tank 21 and is connected with the upper end of the water inlet connection pipe 28, and the other end of the water inlet connector 23 is located outside the main water tank 21 and is connected with a water inlet pipe.

And, the bottom of the main water tank 21 is provided with an installation port for installing the drain valve 10. As shown in fig. 9, the drain valve 10 is inserted through the mounting port from the bottom to the top, the upper portion of the drain valve 10 is inserted into the main tank 21, and the base 12 of the drain valve 10 is fixed to the main tank 21 by a fastening member such as a bolt.

And, the lower end of the water inlet connection pipe 28 is inserted into the connection cylinder 18 of the drain valve 10, so that the water inlet 112 of the drain valve 10 is communicated with the lower port of the water inlet connection pipe 28.

As shown in fig. 10, the wall of the water inlet pipe 28 is provided with a water outlet hole 281, and the water outlet hole 281 is communicated with the interior of the main water tank 21 through an opening 181 of the cylinder wall of the connecting cylinder 18. In the figure, the periphery of the water outlet hole 281 of the water inlet connecting pipe 28 is provided with a flange, the flange extends into the opening 181, and the flange is abutted against the side wall of the opening 181, so that the situation that the water outlet is closed due to the rotation of the water inlet connecting pipe 28 can be prevented.

A drain pipe is connected to the drain port 111 of the drain valve 10, and a control valve is provided in the drain pipe, and the control valve is interlocked with a flush button of the toilet, and is opened and closed by triggering the flush button, thereby communicating or closing the drain port 111 with a drain member externally connected to the main tank 21. In specific implementation, the flushing button can be a mechanical button or an infrared induction type button.

The drain port 121 of the drain valve 10 communicates with the main tank 21, the drain pipe 24 is connected to the drain passage b of the drain valve 10, and the drain pipe 24 communicates with the brush ring water pipe 27 and the spray water pipe 26 through the diversion box 25. In a specific implementation, the drain opening 111 may communicate with the water diversion box 25.

The working principle of the air pressure type toilet 20 is explained:

when the toilet needs to be flushed, the control valve is opened by operating the flushing button, at this time, the drain opening 111 of the drain valve 10 is communicated with the main water tank 21, water in the back pressure cavity a of the drain valve 10 flows into the main water tank 21, the diaphragm of the drain valve 10 is deformed upwards to communicate the drain opening 121 of the drain valve 10 with the drain passage b, the water in the main water tank 21 flows into the drain passage b through the drain opening 121, and then is distributed to the toilet seat water pipe 27 and the spraying water pipe 26 through the drain pipe 24 and the water distribution box 25, so that the toilet seat and the inside are flushed.

When the flushing button is reset, the control valve is closed, at this time, the drain opening 111 of the drain valve 10 is closed, a part of water flows into the back pressure chamber a of the drain valve 10 through the lower port of the water inlet connecting pipe 28, the diaphragm of the drain valve 10 deforms downward, the drain opening 121 of the drain valve 10 is closed, flushing is finished, and when the pressure in the back pressure chamber a is equal to the water inlet pressure, the back pressure chamber a does not feed water any more. Meanwhile, a part of water flows into the main water tank 21 through the water outlet of the water inlet connection pipe 28, and when the pressure in the main water tank 21 is equal to the pressure in the balance water tank 22, the water does not enter the main water tank 21 any more.

In addition, the invention also provides a gravity type closestool 30, and the gravity type closestool 30 comprises the drainage valve 10. Referring to fig. 11 to 13, fig. 11 is a schematic structural view of a gravity type toilet according to an embodiment of the present invention; FIG. 12 is a schematic view of the structure of the fill valve of FIG. 11; fig. 13 is a cross-sectional view of fig. 11.

The gravity toilet 30 includes a storage tank 31, an inlet valve 32, and a drain valve 10. As shown in FIG. 12, the inlet valve 32 includes an upper outlet hole 321, a lower outlet hole 322, an inlet hole 323, a float 324, an adjustment lever 325, and an adjustment arm 326. As shown in fig. 13, the bottom of the water storage tank 31 is provided with a mounting opening, the upper part of the water discharge valve 10 is positioned in the water storage tank 31, and the base 12 of the water discharge valve 10 passes through the mounting opening and is supported on the bottom wall of the water storage tank 31 in a sealing manner through a sealing ring.

Furthermore, the inlet 323 of the inlet valve 32 is externally connected with the inlet pipe. The lower outlet hole 322 of the water inlet valve 32 communicates with the water storage tank 31. The upper water outlet 321 of the water inlet valve 32 is connected to a pipeline, and the pipeline is inserted into the connecting cylinder 18 of the water discharge valve 10, so that the water inlet 112 of the water discharge valve 10 is communicated with the upper water outlet 321 of the water inlet valve 32.

A drain pipe is connected to the drain port 111 of the drain valve 10, and a control valve 34 is provided in the drain pipe, and the control valve 34 is interlocked with a flush button 33 of the toilet, and the control valve 34 is opened and closed by activating the flush button 33, thereby communicating or closing the drain port 111 and the water storage tank 31. In a specific implementation, the flush button 33 may be a mechanical button or an infrared sensing button. In the figure, the flush button 33 is an infrared induction type button, and the control valve 34 is an electromagnetic valve.

The operation principle of the gravity toilet 30 is explained as follows:

when the water needs to be flushed, the control valve 34 is opened by operating the flush button 33, at this time, the drain opening 111 of the drain valve 10 is communicated with the water storage tank 31, the water in the back pressure chamber a flows into the water storage tank 31, the diaphragm of the drain valve 10 is deformed upward, the drain opening 121 of the drain valve 10 is communicated with the drain channel b, and the water in the water storage tank 31 flows into the drain channel b through the drain opening 121 and then flows out, so that the flushing is realized.

When the flush button 33 is reset, the control valve 34 is closed, at this time, the drain opening 111 of the drain valve 10 is closed, a portion of water flows into the back pressure chamber a of the drain valve 10 through the upper water outlet 321 of the water inlet valve 32, the diaphragm of the drain valve 10 deforms downward, the drain opening 121 of the drain valve 10 is closed, flushing is finished, and when the pressure in the back pressure chamber a is equal to the water inlet pressure, the back pressure chamber a does not feed water any more. Meanwhile, a part of water flows into the water storage tank 31 through the lower water outlet hole 322 of the water inlet valve 32, when the water level in the water storage tank 31 reaches a certain level, the float 324 floats upwards and drives the water inlet 112 to close through the adjusting rod 325 and the adjusting arm 326, and the water in the water storage tank 31 does not enter any more.

The above detailed description is provided for the drain valve and the toilet bowl having the same. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A closestool is characterized by comprising a drain valve (10), wherein the drain valve (10) comprises a base (12), a top cover (11) connected above the base (12) and a membrane clamped between the base and the top cover, the membrane and the top cover (11) jointly enclose to form a back pressure cavity (a), and the top cover (11) is provided with a water drainage opening (111) and a water inlet (112) communicated with the back pressure cavity (a);

the base (12) is enclosed to form a drainage channel (b), and the base (12) is provided with a drainage outlet (121); the membrane can deform up and down, can be in sealing contact with the base (12) when deforming downwards to enable the drainage channel (b) and the drainage port (121) to be mutually sealed, and can be separated from the base (12) when deforming upwards to enable the drainage channel (b) and the drainage port (121) to be mutually communicated; the water discharge valve (10) further comprises a connecting cylinder (18) used for being connected with a water inlet pipeline, the connecting cylinder (18) is arranged at the top end of the top cover (11) and communicated with the water inlet (112), an opening (181) is formed in the cylinder wall of the connecting cylinder (18), and the opening (181) is communicated with the water inlet (112) and a water tank outside the water discharge valve (10).

2. A toilet according to claim 1, wherein the discharge valve (10) further comprises a diaphragm seat (14) and a spring (15), both disposed within the back pressure chamber (a); the diaphragm seat (14) is connected with the diaphragm so as to support the diaphragm and move up and down along with the deformation of the diaphragm; the spring (15) is compressed between the diaphragm seat (14) and the top wall of the top cover (11) to apply a downward pressure against the diaphragm.

3. A toilet according to claim 2, wherein the discharge valve (10) further comprises a valve needle (16), the valve needle (16) having a lower end connected to the membrane seat (14) and an upper end protruding into the water inlet (112) to move up and down within the water inlet (112) with deformation of the membrane.

4. A toilet according to claim 2 or 3, characterized in that the membrane is a rolling membrane (13), the rolling membrane (13) having a cavity (131) with the cavity (131) facing upwards and an outer rim (132), the outer rim (132) being provided at the periphery of the cavity (131) and clamped between the cover (11) and the base (12).

5. The toilet according to claim 4, characterized in that the membrane seat (14) comprises a support body supporting the rolling membrane (13), the support body comprising a groove portion (141), a limit portion (142) and a detent portion (143); the notch of the groove part (141) faces upwards, and the outer wall of the groove part is matched with the inner wall of the cavity part (131); the limiting part (142) is arranged at the periphery of the notch of the groove part (141) and is used for abutting against the top wall of the top cover (11) when the diaphragm is deformed upwards to the limit position; the clamping portion (143) is arranged below the groove portion (141), an annular clamping groove (1431) is formed in the periphery of the clamping portion, an inner hole (133) is formed in the bottom wall of the cavity portion (131), and the inner edge of the inner hole (133) is located in the annular clamping groove (1431).

6. A toilet according to claim 5, characterized in that the membrane seat (14) further comprises a guide provided below the support, said guide being located in the drainage channel (b); the guide body comprises a base column (144) and a guide rib (145) arranged on the periphery of the base column (144), the guide rib (145) and the drainage channel (b) extend in the up-down direction, and the guide rib and the drainage channel are matched to guide the diaphragm seat (14) to move in the up-down direction.

7. The toilet bowl according to any one of claims 1 to 3, wherein the water discharge valve (10) further comprises a plurality of clamping blocks (17), each clamping block (17) is arranged at the periphery of the bottom end of the top cover (11) at intervals, the top end of the base (12) is provided with clamping arms (122) clamped with the clamping blocks (17), and the membrane is clamped between the top surfaces of the clamping arms (122) and the bottom surface of the top cover (11).

8. A toilet bowl according to any one of claims 1 to 3, which is an air pressure type toilet bowl (20), wherein the air pressure type toilet bowl (20) comprises a main water tank (21), a water inlet connection pipe (28) and a water discharge valve, a water outlet hole (281) is formed in the pipe wall of the water inlet connection pipe (28), the water outlet hole (281) is communicated with the main water tank (21), the water discharge opening (111) of the water discharge valve (10) is communicated or sealed with a water discharge component externally connected to the main water tank (21) through a control valve, the water inlet (112) of the water discharge valve (10) is communicated with the lower port of the water inlet connection pipe (28), and the water discharge opening (121) of the water discharge valve (10) is communicated with the main water tank (21).

9. A toilet according to any of claims 1-3, being a gravity toilet (30), the gravity toilet (30) comprising a water storage tank (31), a water inlet valve (32) and a water discharge valve, the water inlet valve (32) comprising a lower water outlet opening (322) and an upper water outlet opening (321), the lower water outlet opening (322) being in communication with the water storage tank (31), characterized in that the water discharge opening (111) of the water discharge valve (10) is in communication or closed with the water storage tank (31) by means of a control valve (34); the water inlet (112) of the drain valve (10) is communicated with the upper water outlet hole (321) of the water inlet valve (32) through a pipeline, and the water outlet (121) of the drain valve (10) is communicated with the water storage tank (31).